ELECTROLUMINESCENT BACKLIT DEVICES

摘要

An electroluminescent backlit device (10) utilizing light-emitting polymers (LEP) is disclosed. A sandwich (130) of LEP material (40) and two electrical conductive materials (130) are used to provide back lighting for a keypad (25) or display. The electrical conductive layers (50, 60) are etched to form channels (100) which provide current to and excite the LEP material (40) to produce light at predetermined points. The etchings are directed around existing electrical contacts (35) to facilitate normal operation of the underlying host system, such as a cellular telephone.